Stone-grooving machine



UNITED STATES PATENT OFFICE.

GEORGE YV. BISHUP, OF BROOKLYN, NEW YORK.

STONE-GROOVING MACHINE.

Specification forming part of Letters Patent N o. 16,460, dated January 27, 1857; Ressued April 13, 1869, No. 3,367.

To all whom it may concern.'

Be it known that I, GEORGE WV. BIsHUr, of Brooklyn, Kings county, New York, have invented a new and Improved Stone-Grooving Machine for Grooving Pavements and other lVork; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, figures, and letters of reference thereon, in which- Figure l, is a side elevation of my improved grooving machine. Fig. 2, is a front elevation. Fig. 3, is a top view of it. Fig. 4, is a vertical section of the rotating cam hammers and chisels detached from the machine.

Similar letters of reference refer to like parts in all the drawings.

The nature of my invention consists in so arranging and combining a series of chisels that a rotating hammer may operate them all during its revolutions.

To enable others skilled in the art to make and use my invention I will proceed to describe its construction and operation.

The figures 1, 2, 3, 4, 5, 6, 7, 8 and 9, are parts of t-he frame work which support various working parts of the machinery.

A, represents the boiler of an ordinary steam engine.

B, is the engine cylinder.

O, is the smoke pipe to the boiler.

D, is the connecting rod which is attached in the ordinary way to a crank shaft E, from which motion is imparted to the parts of the machine.

F, is a bevel gear on the crank shaft, which drives another gear G. This gear Gr is made fast upon an upright shaft H, on the bottom of which there is a worm gear I, which works a pinion on the axle K.

L, is the forward axle of the machine.

M, M, are driving pulleys attached to the outer ends of the crank shaft which drive by means of the belts the rotating hammer shaft O, by means of the pulleys N, N.

P, Q, are the guide plates (through which the chisels work) and are made adjustable by means of the slotted ears d, d.

R, R, R, are the rotating cam hammers which strike all the chisels during the revolution of the shaft. I would here remark that these cam hammers are so arranged upon the shaft that only one hammer is upon the chisels at a time, which arrangement contributes to the even and easy working of the machine, thereby requiring less power which is a great advantage.

S, S, S, are the chisels which are plainly shown in all the figures. These chisels are arranged with a collar T, on them which is made fast by means of a screw or otherwise. Directly below this collar T and around the chisels are small helical springs (c) which bear at their upper ends against the collar T, while their lower ends rest against the guide bar Q. The object and purpose of these springs is to react the chisels after receiving the blows from. the

hammer.

The revolving hammer shaft O, has its journals in sliding boxes U, which are secured in the proper position to give the requisite blow to the chisels by the bolt and nut (e) or other proper manner. The crank shaft is supported and has its journals in proper standards V, attached to the frame rails. The shaft H, has its bearings at its upper end in the plate 8, while the lower end rests in a cross-piece attached to the frame work 9.

Operation: Motion being given the crank shaft it imparts a motion through the pulleys M and N by means of the belts (o, o) to the rotary hammer shaft, which as it revolves strikes the chisels singly, and as soon as the hammers have passed the chisels they react by means of the helical springs ready for another blow. The guide bars are setin the right position to cut deep or shallow grooves, and the hammer shaft set to correspond for the proper blows. On the upper end of the upright shaft H, there is a bevel pinion which is worked from the gear F, on the crank shaft, while on the lower end of the shaft H is a worm gear which wo-rks a pinion on the rear axle K, and by their conjoint action cause the machine to regularly progress forward. I would remark that the feeding of the machine may be regulated by the size of the gearing on the shaft H to work slow or fast at the option of t-he engineer.

I am aware that revolving hammers or cams have been made use of in stone dressing machines for operating the chisels and I therefore do not claim such revolving give a positive motion to all the chi'tsels from hammers; but, a single hammer for each series of chisels I claimsubstantially as set forth. A series of vertical inclined chisels of dif- G. W. BISI-IUP. [L s.] 5 ferent lengths placed one behind the other; Vitnesses:

in combination With a revolving hammer or C. A. DURGIN, cam as described; whereby I am enabled to GEO. KELLooK, J r.

[FIRST PRINTED 1912.] 

